Reservoir fluid production rate inevitably decreases during the exploitation of oil and gas fields. Methods of enhanced oil recovery (MEOR) are the only technique that allows maintaining oil production level, thereby increasing the period of profitable exploitation of oil and gas fields.

Enhanced oil recovery methods are the following:

thermal;

gas;

chemical;

hydrodynamic;

combined methods;

methods for increasing well productivity, etc.

It should be remembered that increase in production rates inevitably causes the following problems:

increased water cut;

damages to the well structure, caused by repair and perforating-explosive operations in the well bore, as well as corrosion processes developing in course of production of underground fluids.

They can be resolved by repair and insulation works (RIW), that will allow to: